Jeff Bezos Update on BE-4 Engine Progress

Beginning to slot one of our nozzles. (Credit: Blue Origin)
Beginning to slot one of our nozzles. (Credit: Blue Origin)

We’re making multiple copies of the BE-4 to take us through our development campaign, along with a healthy amount of hardware spares to mitigate schedule and technical risks encountered along the way – – a “hardware rich” approach to development. To maintain a fast pace, we’ve elected over the past years to invest heavily in key machines, tooling and people for the production of BE-4 so we can control critical processes in-house.

Completion of slotting of a main combustion chamber (Credit: Blue Origin)
Completion of slotting of a main combustion chamber (Credit: Blue Origin)
Preparing inspected GOx dome casting for machining (Credit: Blue Origin)
Preparing inspected GOx dome casting for machining (Credit: Blue Origin)
Preparing inspected GOx dome casting for machining (Credit: Blue Origin)
Preparing inspected GOx dome casting for machining (Credit: Blue Origin)

We’ve also started testing the BE-4 preburner in our recently commissioned pressure-fed test cell. We’re developing the transient start sequence for the preburner, and we’re making good progress.

Hot firing a 14” diameter preburner (Credit: Blue Origin)
Hot firing a 14” diameter preburner (Credit: Blue Origin)

We’ll continue to keep you posted on our progress as this engine comes together.

Gradatim Ferociter!

Jeff Bezos